Does it matter what liquid you use in the airlock?

[ChrisS68]

Any chance vodka could attract vinegar flies?

Say What?

Vodka or Gin - whatever is on-hand.

 

[MonkeyWrench]

+1 Vodka, cheapest I can find.

I always get suck back when cold crashing.

 

[MultumInParvo]

I use bleach and water. It is dirt cheap, won't mold, evaporate, or have any other issues. As for suck back I have never seen it. Either people have different airlocks than me or they're overfilling them. My airlocks will let through air before they ever let in sanitiser...

 

[ReverendTap]

I use bleach and water. It is dirt cheap, won't mold, evaporate, or have any other issues. As for suck back I have never seen it. Either people have different airlocks than me or they're overfilling them. My airlocks will let through air before they ever let in sanitiser...

Minor quibble: bleach will mold. There's stuff it won't kill, and I've talked to people who have left sanitizing-strength bleach solutions sitting out for long periods of time and came back to find interesting stuff growing on the surface. Rare, but by no means impossible.